Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John G. Alevizos, D.O., A Professional Medical Corporation

Occupational Medicine Physician in Santa Ana, CA · enumerated 2020 · authorized official John Alevizos, President/Medical Director.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1952919763

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Registry record

Entity type Organization (Type 2)

Legal business name John G. Alevizos, D.O., A Professional Medical Corporation

Practice address 1530 East Edinger Avenue, Suite 1, Santa Ana, CA, 92705

Phone (714) 442-0400

Fax (714) 542-0038

Enumeration date Jul 17, 2020

Last updated in NPPES Jul 17, 2020

Taxonomy & classification

2083X0100X Occupational Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name John Alevizos

Title President/Medical Director

Phone (949) 916-3600

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is John G. Alevizos, D.O., A Professional Medical Corporation?

John G. Alevizos, D.O., A Professional Medical Corporation is registered in NPPES as a Occupational Medicine Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-07-17.